NH ₄ V ₄ O ₁₀ micro-flowers as cathode material for high performance hybrid magnesium-lithium-ion batteries

The hybrid magnesium-lithium-ion batteries (MLIBs) combine the advantages of Mg anode and the Li ⁺ intercalation cathode. Constructing high-performance cathode is the key and challenge for the futuristic MLIBs research. Layer NH ₄ V ₄ O ₁₀ is found to be an ideal cathode for MLIBs owing to layer structure and high work voltage (∼1.8 V vs. Mg/Mg ²⁺ ). In this work, the NH ₄ V ₄ O ₁₀ micro-flowers are prepared through a facile hydrothermal method. As cathode for MLIBs, the NH ₄ V ₄ O ₁₀ exhibits a high specific discharge capacity of 228 mAh g ⁻¹ at 100 mA g ⁻¹ in the voltage range of 0.5–2.0 V vs. Mg/Mg ²⁺ .